Johnson, Ariana

Question

DISTRICT Biology 1 Unit 1 24/25
27 of 2727 of 27 Items

Question
Two people are exercising at a gym. Person X notices a burning sensation in several muscles, while person Y does not feel any discomfort at all.

Why are these two people feeling different sensations?

Responses

Person X is breaking down glycogen through aerobic respiration and is producing less lactic acid than person Y.
Person X is breaking down glycogen through aerobic respiration and is producing less lactic acid than person Y.

Person X is breaking down glycogen through aerobic respiration and is producing more lactic acid than person Y.
Person X is breaking down glycogen through aerobic respiration and is producing more lactic acid than person Y.

Person X is breaking down glycogen through anaerobic respiration and is producing less lactic acid than person Y.
Person X is breaking down glycogen through anaerobic respiration and is producing less lactic acid than person Y.

Person X is breaking down glycogen through anaerobic respiration and is producing more lactic acid than person Y.

Answer 1

The correct response to explain why Person X is feeling a burning sensation in their muscles while Person Y does not is:

Person X is breaking down glycogen through anaerobic respiration and is producing more lactic acid than person Y.

Here's the reasoning behind that choice:

• When muscles engage in intense exercise, they may not receive enough oxygen for aerobic respiration. As a result, they switch to anaerobic respiration, which leads to the production of lactic acid as a byproduct.
• The accumulation of lactic acid in the muscles can cause a burning sensation and discomfort, which is what Person X is experiencing.
• On the other hand, if Person Y is exercising at a lower intensity or has a higher capacity for aerobic metabolism, they may be able to utilize oxygen efficiently, thereby producing less or no lactic acid, resulting in no discomfort.